600X usb digital microscope 1.usb portable digital microscope , 2.focus range: Manual focus from 10mm to 500mm 3.25X-600X 600X usb digital microscopeApplication : ... )Power SupplyUSB Port ( 5V DC )InterfaceUSB 2.0 & USB 1.1 CompetiableOperation SystemWin XP , Vista , Win 7 32 ... X 33 mm ( R )Accesseries1.5M USB cable, CD disk,Metal Fix Stand, color box, simple user manual 600X usb digital microscope